Planooftaph co



. A. C. CHAKRAVARTY AND F. H. GREIL.

AUTOMATIC sHlN BONE CUTTER.

APPLICATION FILED SEPT. 13'. 1918.

1 ,-309,017. Patented July 8, 1919.-

3 SHEETS-SHEET I.

A. C. CHAKRAVARTY AND F. H. GREIL.

AUTOMATIC SHIN BONE CUTTER.

I APPLICATION FILED SEPT. 13. 1918.

3 SHEETS-SHEET 2.

Patented July 8 WWP THB COLUMBIA PLANOGRH COI, WASHINGTON. D c

UNITED STATESPAIENT OFFICE.

AKHIL o. GHAKRAVARTYAND FREDERICK iicfieiiin,4 or CHICAGO, ILLiNois. l

To all @hom t may concern: y l v Be it known that we, AKHIL C. CiAKRA-vAR'rY, a citizen of the British Empire, -re- `siding at and whosepost-oflice' address is 1218 East Marquette road, Chicago, Illinois,

and FREDERICK H. Gniiin, ,a kcitizen of the' United States, residing atand whosepostoffice address is 6617 Drexel-avenue, Chicago, Illinois,have invented certain new and provide means for continuously landauto-'- matically detaching such refuse fronnthe receptacle into whichthe samel is drawn. i

More particularly, our invention aims to provide an effective appliancefor cuttingfthe shin bones ofcarcasses intodesired lengths, for catchingthe particles detached by the teeth of the saw, and fo-r preventing suchparticles from clogging, the appliance.

In packing housepractice, it has heretoforek been customary to feedbones of the,

kind mentioned along a guide, and to Saw off these bones by means of acontinuously rotating saw which was moved into position manually. Inthis way, the reciprocation of the saw-had to 'be accomplishedby manualpower, andthe particles detached by the saw teeth scattered widely overthe machine, the operator -and the adjoining` room `space. Consequently,such sawing appliances not only have required considerable labor `out,-side of the feeding of the bones to the saine, lbut also have been slowin operation and have caused a waste of the detached parti'- cles ofbone, marrow and fat, which particles form a considerable amount where a.maf`

chine of this kind is in steady operation. Moreover, the spattering ofthese partlcles over the machine, the room and the operator have allbeenobjectionable, and the 'necessary removal of the widely scatteredparti-- cles has required additional labor.

Our invention aims to overcome these and other objections to theappliances heretofore in use, first, 'by providing a machine in whichthe continuously rotating sawis steadily and e' Specifcation ofLette'rs'rtent. 1.

mechanically. reciprocated i across the path into vwhichthe bones havefed; second, by inclosing tlie sawalmost entirely by a casing which willcatch thedetached refuse; and third by; providingautom-atic means forycontinuously scraping the refuse' from'. 'the interiorof such a casing,so thatthisrefusewill readily pass intoany convenient vreceptacle inwhichv y'it linay ybe gathered -l as a valuable byproduct.

Y Still further obj ects ofl our invention will l Patented July 8.',1919.V i Application filed September 13,1918.. "Se'ra1No.2i53,916. i I'i appear fronithe yfollowingspeciiica-tion and from the accompanyingdrawings, in which drawings il. V i l Figure' 1 is a Vfront elevation:of a machine embodying our vinvention, with thewrocker arm in its medialposition.l

Fig.y 2 is an end view ofthe same vtaken from the left hand endofFig. 1. r1,` n n Fig. 3 is a vertical section along the line 3-3 of Fig.2, with the rockerparin in .one of its extreme positions. i .A i; Fig. iis a fragmentary vertical section taken through 4 4.

twin funnel portion ofthe inclosing casing, taken from the right of thesawrin Fig. Afl.

VFig.-6 is a fragmentary perspective',view.v

ofthe twin funnel .and the scraper-s operatingin the latter.

Inv the embodiment ofthe drawings, the sawing appliance of our inventioncomprises a-frame 1 supporting bearings for apower shaft 2, which shaftcarries fast and 4loose pulleys. as shown in Fig. 2 and whichshaft iscontinuously rotated during the normalA operation of the machine.y Thepower*L shaft 2 is connected by a link chain 3 and suitable gearingvto asecondary shaft 4 journaled in a bearing falso carried bythe frame l, sothat' this secondary shaftalso normally is continuously rotated. Pivoted.upo'nmthe power shaft 2 is a rocker arm y5, which rocker as shown inFig. 4 and the upper ends of its two Shanks-affordy journalsv fora shaft8 carrying a circular saw)v and' a pulley 10.

The pulley 10 is belted to afdrive pulley 11 fast. upon the power sha-ft2so that the saw 9 is continuously rotated at a considerablyy higherspeed than the shaft 2 ywhenthe'i'nachine is in operation. The` frame 1desir- Aably has at its topa table 12 equipped withA Fig. lalongthezigzag line- Fig. 5v is a vertical section .through the a slotsomewhat wider than the saw 9 and of such length as t0 allow Afor thefree reciprocation of the saw 'by the raction of the aforesaid crank andconnecting rod on the rockerarm. Adjacent to one side of the. said slot,Vthe table 12 carries a guide 13, desirably U-shaped in section, whilethe other side of the table is preferably depressed so as to forma'chute 27 for feeding detached boneparts into la conveniently disposedreceptacle'. All' of the said slot' with the eX- ception of the partalining with the said guide is covered by hoods 14 and 15, which hoodsform a part of a casing designed for housing the-saw and catching therefuse particles detached ;by*the latter. This casing also includes valower portion16, which portion desirably is in the form 0f a' twinfunnel having openings directedl respectively'towairdopposite'sides ofthe power shaft 2. r

To prevent the detached particles of the'y sawed `bones fromV clingingyto the sides of the-casing portion 16 and to the ledge 17 which formsthe bottom connecting the two funnel shapedoutlets, we provide scraperscontinuously reciprocated during the opera-y segment is fastened to therocker arm 5 and is concentric with the power shaft 2, so that theoscillation of( the .rocker arm will likewise cscillate the segment 23and will therefore move 'the pin 2O` back and forth along the vare 21.1n so doing, this pin, acting through the link 19, will swing thescrapers 18 back and forth substantially as shown in dotted lines inFig.'4 51 thus detacliing such particles as may have affixed themselvesto various side pc'irtionsof the casing 16, the scraper 18beingjprefer'ably of a width approximatingthe"interior Width of thecasing 16. Likewise, therocker arm 5 directly carries a scraper 25extending transversely ofv the casing '16 through. slots 26 at oppositesides of the latte/@which slots are close to the curved bottom portion17 of said casing, so that the oscillation of the rocker armautomatically scrapes any deposited material off `thisbottoni 17andtosses such material toward the outlets of lthe casing 16.

The'j'cliain gear' on the crank shaft 4L is Gopiel otthpstpatentmay-beobtained for ve cents eali, hyg addressing, thelfigqmxriissioiier, ctf-12atentsmreciprocated at a sufficiently moderaterate to .permit the feeding of a bone across the guide during the shortinterval-of time while thesaw is entirely clear of this guide.Moreover,` since the-rocker arm carrying the saw arbor f 8 isAcontinuously reciprocatcd by power, 'the' Voperator can confine' hisentire attention tofeeding of the bones' alongitlie guides 13, thusenabling Va single operator to accomplish the sawing at a much higherrate of speed than has heretofore been customary.

Likewise, since by' far thefgreaterpartof the detachedi refuse caught bythe hous-` ingfaiidV since this housing is continuously scraped to.'prevent it from being clogged, no attention-need to be paid to thisrefuse by the operatpr.v On the contrary, this refuse is automaticallyfed-through the twin funnel outlets to vconvenient receptacles, (notshown in the drawings) sc as to save the refuse as an additional sourceof revenue. However,

while' we have illustrated fand described our niachineas including asubstantially H- shaped 'rocker arm andas having certain connectionsmade through a link chain and other connections throughs. bolt, wedo notwish to be limited to these or other details of the constructionv and?arrangement here described, itgbeingobvious that the same niight'bemodified in" many ways without departing fromy the spirit of oul`invention within the scope of .the appended claims. claiinas ourinvention :1' In asa'wing appliance, a support equipped for guidingthestock, 'a refuse-catching cas` ing carried by the supportaiidliaving'an upper transverse opening'throngh wliiclr the stockis fed, the:said casing also'havingare. uate slots in its opposite sides; a shaftjournaled xon thesu'pport belowthe said easing and; concentricl withlthe `said-slots, U-` shaped rocker arm journaled concentricwith' thesaid" shaft and presenting arms Aatoppositev sidesi of the casing, a'sawarbor carried jointly by the said arms and, extending throughtl'iearcuateslots'in the casing, a

saw yfast onthe arborand vdisposed within the Vcasing, and coperating,means (for rotating the Varbor andtfor: reciprocating the rocker-armabout its said'jtminaliiig.` Y

YSigned at Chicago'Septembef y6th, 1918.

` AKHL. C. CHAKRAVARTYL "FREDERICK H/GRML# Washington, ID. Gf

